Well-casing drill.



J.'0. KAFADER.

WELL CASING DRILL.

APPLICATION FILED FEB.4.1914

Patented Feb. 2, 1915.

2 SHEETS-SHEET 1.

/ 11/ VE/V 70/? 7; y/ ghilrii J. O. KAFADER.

WELL CASING DRILL.

APPLICATION FILED FEB, 1914.

Patented Feb. 2, 1915.

2 SHEETS-SHEET 2.

l/VVE/VTOR @7166 ajfafaczwf WITNESSES A TTOR/VEYS UNITE STATES PATENT 'oFFIcE.

JAMES OLIVER KAFADER, OF FORT BIDWELL, CALIFORNIA, ASSIGNOR 0F ONE-HALF TO E. T. VAUGHAN, OF FORT BIDWELL, CALIFORNIA.

WELL-CASING DRILL.

Specification of Letters Patent.

Patented Feb. 2,1915.

Application filed February 4, 1914. Serial No. 816,650.

To all wk am it may concern Be it known that 1, JAMES O. KAFADER,

a citizen of the United States, and a resident ofFort Bidwell, in the county of Modoc and State of California, have invented a new andImproved'Well-Casing Drill, of which the following is a full, clear, and exact description.

This invention relates to a well casing drill for the purpose of drilling holes in a well casing in those regions where there are strata of water in the earth.

The general objects of the invention are to improve and simplify the'construction and operation of well casing perforators of the drill type so as to be reliable and efficient in use, comparatively inexpensive to manufacture and keep in operative condition, and so designed as to be easily and quickly manipulated'and positioned.

Another object of the invention is the.

provision of a tool of the character referred to which includesa tool suspension and drill drivingshaft which is rotated by suitable means at the to of the well casing.

A further ob ect of the invention is the .provision of means operable from a point at the top of the well casing for effecting the feed of the drill, and coacting therewith is an extractingdevice which automatically extracts, when the feeding means is returned to normal position, the drill from the hole after the latter is drilled.

A further objectof the invention is the provision of a drill in which the body is mounted on the drill driving and tool susension rod, and the feeding means emodies a sliding wedge movable longitudinally'of the body and arranged to engage a thrust member or abutment pivotall mounted upon the body, and on the sha t is rovided means with which the said we go, when in initialposition, is adapted to interlock, so that the body and shaft can be turned as a unit to bring the drill to the next point where a hole is required.

With such objects in view, and others which will appear as the description proceeds, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.

In the accompanying drawings, which illustrate one embodiment of the invention, and wherein similar characters of reference indicate corresponding parts in all the views, Figure.l is a vertical section of a sunken well casing, showing the tool in positiontherein for the purpose of drilling holes, and showing the body of'the tool in elevation; Fig. 2 is an enlarged sectional view of the tool taken longitudinally and showing the position of the parts prior to the drill being set for boring; Fig. 3 is a similar view showing the drill in operation; Fig. 4 is a side view of the tool; Figs. 5 and 6 are horizontal. sections on the lines 5-5, 66, respectively, Fig. 2; and Fig. 7 is an enlarged sectional view of the drill and chuck therefor.

Referring to the drawings, A designates a well casing which is provided with a cap or equivalent means a at its upper end which serves. to form a support for the drilling tool designated generally by B. which tool is adapted to be lowered into the casing to the required depths for the purpose of drilling holes in the casing at the various strata of water through which the well casing has been driven, whereby the water can enter the casing through the holes. In the present instance the casing is shown as passing through two strata 0 of water, and the casing A is shownas having openings a. drilledtherein at such strata. The tool is adapted to drill one hole at a time and is hence ca able of being adjusted from point to point where the holes are required.

The tool B comprises an elongated body 1 which is made of a strip of metal bent U-shaped into 'side members 2 and a connecting portion 3. Between the lower or free ends of" the side members 2 are blocks 4 and 5 which are spaced apart from each other and are secured to the members 2 by pins or rivets 6. By this arrangement a chambered frame or body is formed which is opened at two sides. The body or frame 1 is suspended on the lower end of a shaft 7 that is made in sections and united by a coupling 7' so that the shaft can be lengthened or shortened to reach any desired depth in the well casing. The shaft is rotatable .in bearings 8 at the top of the frame body 1 and 9 in the bearing block 4, and on the lower end of this shaft is a bevel gear 10 which meshes with a bevel gear 11 on the chuck 12 which has its spindle or shaft 13 journaled in a horizontal bearing 14 formed in the lower block 5. In this chuck 12 is fastened in any suitable manner the twist or other drill-15 which has its axis at right-angles to the axis of the shaft 7.

On the upper end of the shaft 7 is a suspending collar or equivalent device 16 which suspends the entire tool on the ca 10 in such a manner as to permit the sha t to be rotated, such rotation being produced by a crank or equivalent device 17.

The tool embodies a feedin means which is mounted on the body or rame .1 of the tool and is controllable from the top of the well casing. This drill feeding means comprises a-wedgc 18 which is slidably mounted within the body 1 and operates on a thrust element or abutment 19 which is mounted in the body 1 atthe side op osite from the wedge 18 and is adapted to e thrown laterally by the wedge so as to engage the pipe. The wedge 18 has a stem 20 which-slides in a bearing 21 in the upper part 3 of the frame 1, and this stem terminates in an eye 22 to which is connected the lower end of a. pull cord or element 23 that extends up wardly to and out of the cap a on the well casing. A helical compression spring 2 1s arranged on the stem 20 of the wedge and interposed between a shoulder 25 on the wedge and the bearing 21 for the stem, whereby the spring urges the wedge dow'n-.

, wardly to its initial or inoperative position.

The loweror thickest end of the wedge is provided with a longitudinal groove 26 so that the wedge can straddle or embrace the shaft and thus take up less room. Y The inclined surface 27 of the wedge. is adapted to engage the inclined surface 28' of the thrust element 19, so that when the wedge is raised, the thrust element is thrown out of the body of the tool and engaged with the well casing. To guide the lower end off-the wedge and to resist the lateral thrust due to its wedging action, lugs 29 extend from the sides of the wedge and are movable in slots 30 in the side members 2 of the body of the tool. In order to adapt the tool for operation on well casings of different diameters, the thrust element or abutment 19 has a removable section 19 which can be taken off and a section of difl'erent proportion substituted. The lower end of thissection 19' has a lug 31 which enters an openin 32 in the body section 19" of the thrust e ement,

while a screw 32 serves to fasten the upper end of the section 19' to the section 19". The upper .end of the section 19 of the thrust element is connected by a ivot 33 with the'upper part of the tool b y.

It is desirable to automatically extract the drill from a hole that is drilled in'the well withdraw the casing, and for this purpose-an extractor 31 is fastened to the lower end of the body of the tool. This extractor is in the form of a doubled leaf spring which has the end 35 secured to the .tool body by a screw 36 at the side opposite from the drill 15, and'the other or free end 37 of the extractor extends transversely of the drill 15 and has an opening '38 into which the drill 15 is adapted to enter.- Normally the spring 15 stands outwardly beyond or flush with the tip of the drill, but

17, and by reason of this the drill 15 is ro-- tated and the constant pull on the cable will cause the drill to feed as the hole is being bored. The extractor during this drilling operation is enga ed ,with the well casing,

he operator then pulls upwardly on the cable 23, which and consequently ecomes compressed as the drill proceeds through the wall of the casting, and when the operator feels that the 7 hole is completely drilled by the diminution in resistance, he releases the cable 23, whereby the wedge is shifted downwardly by the I expansion of the spring .24. The abutment element 19 gravitates to a pendant position,

and thespring extractor expands so as to rill from. the hole inthe well casing. The tool is now turned to a new position for enabling another hole to be drilled.

A clutch or locking means must be rovided to cause thebody of the tool and sii turn as a unit in bringing the drill to a new position. For this pur use a pin or equivalent devic'e 36 is provi ed on the lower end of theshaft 7 so as to enter the roove or socket. 26 provided in the lower e ge of the wedge 18, so that when the wed e is in lowered position it prevents'the'sha from turnaft 7 to ing independently of the body of the tool,

After the tool is turned to a new position the operator again pulls upwardly on the cable 23, and in so doing sets the tool for drilling. The crank 17 is again turned so as to rotate the drill 15, and simultaneously the drill is fed by the constant u weirdly-maintained pull upon the cable.

t will thus be seen that the tool can be readily adjusted or positioned to drill a number of holes in the well casing with great despatch and ease.

From the foregoing description taken in connection with the accompanying drawings, the advantages of the construction and method of operation will be readily understood by those skilled in the art to which the invention appertains, and while I have described the principle of operation, together with the device which I now considcr to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative, and that such changes may be made when desired as are within the scope of the appended claims. Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A well casing drilling tool comprising a body, a shaft rotatably mounted therein,

a drill on the body and connected with the shaft, :1 well-engaging thrust member com' prising a part movably mounted on the body and another part adapted to engage thewell casing to be drilled and being removable so as to be adapted to be interchanged with other parts to adapt the tool for well casings of different diameters, and

a movably mounted element on the said body arranged to; engage the first-mentioned part of the said thrust member to cause the said member to engage the well casing and feed the tool bodily to advance the drill as the drilling operation proceeds.

2. A well casing drilling tool of the class described comprising a body, a shaft journaled in the lower end thereof and adapted to extend to the top of the well casing, a drill operated by the shaft, means mounted on the body and movable into engagement with the well casin at the side 0 posite from that in which t e hole is to be rilled, and a longitudinally movable element mounted on the shaft and o erable fromv the top of the well casing or operating said means.

3. A well casing drilling tool comprising a body, a shaft rotatably mounted therein and forming suspension means for the body, a drill disposed at right-angles to the shaft and operatively connected therewith and extending from one side of the body a wellengaging thrust element extending from the opposite side of the body, and a device mounted on and movable longitudinally of the body for engaging the said element for producing a feeding movement of the drill.

4. A wellcasing drilling tool comprising a body, a shaft rotatably mounted therein and forming suspension means for the body, a drill disposed at right-angles to the shaft and operatively connected therewith and extending from one side of the body, a wellengagingthrust element extending from theopposite side of the body, a device mounted on and movable longitudinally of the body for producing a feeding movement of the drill, and a spring for returning the device to normal position. ,7

5., A well casing drilling tool-comprising a body, a shaft rotatably. mounted therein and forming suspension means for the body, a drill disposed at right-angles to the shaft and operatively connected therewith and extending from one side of the body, a wellengaging thrust element extending from the opposite side of the body, a device mounted on and movable longitudinally of the body for producing a feeding movement of the drill, and an extractor mounted on the body and arranged to remove the drill from the hole drilled thereby.

6. A drill of the class described comprising a body, a drill carried thereby, means for rotating the drill, a member carried by the body and serving to move the latter ing a body, a drill carried thereby, means for rotating the drill, a member carried by the body and serving to'move the latter laterally to effect the feeding movement of the drill, a wedge movably mounted on the body and arranged to engage the said member to force the latter laterally from they body, and a spring mounted on the body and having one end disposed adjacent the drill for extracting the latter from the hole drilled thereby when the wedge returns to normal position.

8. A tool of the class described comprising a body having a longitudinal chamber open at opposite sides, a pivoted thrust element in one open side of the chamber, a wedge disposed in the other open side and arranged to engage the said element for moving the latter outwardly, a drill carried by the body, means for rotating the drill, means for returning the wedge to normal position for permitting the thrust element to return to inward position, and means for automatically extracting the drill by mov- 10. A tool of the class described comprising a body, a shaft rotatable therein, a drill holder operatively connected with the shaft, a feeding means mounted on the body, and means between the feeding means and shaft for causing the body and shaft to turn as a unit.

11. A tool comprising a body, a shaft rotatable therein, a thrust element pivoted on the body, a wedge on the body and arranged to move the thrust element outwardly, means on the shaft with which the unit, and a drill holder mounted on the lb body and operati-vely connected" with the shaft.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES OLIVER KAFADER. Witnesses:

C. L. PETERSON, R. R. BAKER. 

